export default {
	namespaced: true,
	
	
	state: ()=>({
		
		cart: JSON.parse(uni.getStorageSync('cart') || '[]')
	}),
	
	mutations: {
		addToCart(state, goods){
			const findResult = state.cart.find(x=> x.goods_id === goods.goods_id)
			// console.log(findResult)
			
			if(!findResult) {
				state.cart.push(goods)
			}else {
				findResult.goods_count++
			}
			
			// console.log(state.cart)
			
			this.commit('m_cart/saveToStorage')
		},
		saveToStorage(state){
			uni.setStorageSync('cart', JSON.stringify(state.cart))
			
		},
		
		//更新购物车中的商品状态勾选
		 updateGoodsState(state, goods){
			 const findResult = state.cart.find(x=> x.goods_id === goods.goods_id)
			 if(findResult){
				 findResult.goods_state = goods.goods_state
				 
				 this.commit('m_cart/saveToStorage')
			 }
		 },
		 // 
		 updateGoodsCount(state, goods){
			const findResult = state.cart.find(x=>x.goods_id === goods.goods_id)
			 if(findResult){
				 findResult.goods_count = goods.goods_count
				 this.commit('m_cart/saveToStorage')
			 }
		 },
		 // 
		 removeGoodsById(state, goods_id){
			state.cart = state.cart.filter(x=>x.goods_id !== goods_id)
			this.commit('m_cart/saveToStorage')
		 },
		//
		 updateAllGoodsState(state, newState){
			 state.cart.forEach(x=> x.goods_state = newState)
			 
			 this.commit('m_cart/saveToStorage')
		 }
		
	},
	
	getters: {
		// 购物车中所有商品的总数量
		total(state){
			// let c =0
			// state.cart.forEach(x=> c += x.goods_count)
			// return c
			return state.cart.reduce((total, item)=>total += item.goods_count ,0)
		},
		// 购物车中已勾选的商品总数量
		checkedCount(state){
			return state.cart.filter(x => x.goods_state).reduce((total, item) => total += item.goods_count,0)
		},
		// 价格合计
		checkedGoodsAmount(state){
			return state.cart.filter(x => x.goods_state).reduce((total, item) => total += item.goods_count * item.goods_price ,0).toFixed(2)
		}
		
	}
}